Small review of LCSC

[Moondeck]

Hello everyone,
got my package from LCSC today, if anyone is in doubt, its actually legit. Didn't expect it to come at first tbh but its here
Got a small blog post on it here:
http://moondeck.novakovsky.eu/2017/10/parts-from-lcsc/

[edavid]

Thanks for the review.  Did you pick the cheaper shipping?  How long did it take?

For US buyers, it looks like the minimum shipping is $5, but it goes up pretty slowly from there.

The website is truly horrible - almost impossible to find things 

[janekm]

BTW their PCB factory (JLCPCB) is very well known within China. One of the most popular ones around. Their component service does have a good reputation as well (my Chinese colleague reckons they tend to stock genuine parts, though their selection is a little limited).

[janoc]

I have tried them recently too after seeing one of the GreatScott! videos promoting them. They are behind the EasyEDA design software too.

No problems at all, took me about 2 weeks to get the boards since the order (with the cheapest shipping).

I have ordered both boards and components from them. The component selection is  limited, but usable. However, beware with JLCPCB pricing - the crazy good  $2 price is only valid for 100x100mm boards. If you exceed that even by 0.1mm you will pay the regular $20-something price already.

[Moondeck]

I took the cheapest shipping yes, at 5.8$ (more than the components O.o), took the standard 3 weeks. But yeah, you gotta know what you're looking for to find something. I havent tried JLCPCB but i am planning to very soon.

[mrpackethead]

I have placed three orders with them.  In total about USD$4000 of parts.   LCSC is part of a huge group of buisness,  ( SZLCSC, JLPCB etc ), and they are very legit. They are sort of the chinese mouser/digikey..    Freight was between $20 and $30.. one of the orders was 5kg.   Parts are legit..  Mostly i was buying passives, though bought a reel of TI Switchers.  Delivery was really quick,  was with me in a few days from ordering, via DHL.  Payment was via Paypal.

The web site is a dog. its really hard to use, compared to mouser/digikey. This carries through from the SZLCSC ( which is in chinese ) which is equally as bad.

you cnat' backorder things that are not in stock.  THere is no information about how many parts are on a reel..  If you order say 3000 resistors dnt' expect them all to come on a single strip.   

I have talked to them and they are looking to improve on things, but the proof will be in the pudding..   

There are some real good savings to be made on some items, but not everything.    You'll spend longer ordering that you will on DK/Mouser but you might also save a Lot of coins.

[neslekkim]

But capacitors manufactured by ReliaPro and ValuePro?

[mrpackethead]

But capacitors manufactured by ReliaPro and ValuePro?

In my case, caps from well know brands like Murata, TDK and panasonic.

The ReliaPro and ValuePro are some kind of weird branding that they apply..   I got some Connectors that are aweosme which are labelled Reliapro, but we dont' know who really made them.

[neslekkim]

Ok, I was looking around a bit to see if I found panasonic electrolytes, but found only strange names.
Would be nice if the webshop would give me option of filtering on manufacturer also.

for prototyping and play I don't care, but some things I want proper stuff into.

[mrpackethead]

Yes, the web site is a major dog to use.

[Moondeck]

Aren't they pretty new on the international market though? Never saw them before.

[HwAoRrDk]

I had poke around the website a while back too. Was intrigued by the potential for a source of all those cheap and ubiquitous Chinese special-purpose ICs such as LED drivers and Li-Ion protection.

One feature the website is sorely lacking is the ability to sort results - e.g. by price or stock. I did see filtering by manufacturer, though. But not in all categories.

[Moondeck]

The manufacturers are fsck'd up often too. Hope they will improve their website soon, its a major PITA. You can pretty much only search for something if you know what EXACTLY you are looking for.

[mrpackethead]

only new in respect of providing an englsh interface..   Youve been able to buy from SZLCSC for a long time.

[thm_w]

Their prices are ridiculously good compared to digikey for passives/connectors.
All of the parts I got were good quality, other than the JST XH connectors which look cheap but that's expected, and they are pennies each. They even have red and black versions.

Of course they don't have everything. So it makes sense to design around their commodity parts for hobby projects (like fets, diodes, esd diodes, etc.), as those have big markup from digikey.

[LaserTazerPhaser]

Didnt want to start a new topic - regarding LCSC they have lots of brands not found elsewhere. For instance this part

https://lcsc.com/product-detail/Others_NCE01H10_C191381.html

seems great for the cost given its ratings - however the brand is not found else were. It does however have a datasheet with specifics. However it might not actually perform as it should. Is it likely a legitimate part?

[thm_w]

Didnt want to start a new topic - regarding LCSC they have lots of brands not found elsewhere. For instance this part

https://lcsc.com/product-detail/Others_NCE01H10_C191381.html

seems great for the cost given its ratings - however the brand is not found else were. It does however have a datasheet with specifics. However it might not actually perform as it should. Is it likely a legitimate part?

Yes almost certainly. There is of course the risk if you design it into a commercial product, that you won't be able to source it at some point. But I'm sure similar parts exist.

http://www.ncepower.com/en/proMOSFETs.aspx?cateid=101

[mikeselectricstuff]

One feature the website is sorely lacking is the ability to sort results - e.g. by price or stock. I did see filtering by manufacturer, though. But not in all categories.

You can sort by price, and show in-stock items only

[LaserTazerPhaser]

Yes almost certainly. There is of course the risk if you design it into a commercial product, that you won't be able to source it at some point. But I'm sure similar parts exist.

http://www.ncepower.com/en/proMOSFETs.aspx?cateid=101

How about a part such as this

https://lcsc.com/product-detail/MOSFET_HL-1H05_C237256.html

its specs for the price don't seem authentic. Vacant also is a safe operating area - a part rated to the values which its rated to should have it specified.

[mrpackethead]

Yes almost certainly. There is of course the risk if you design it into a commercial product, that you won't be able to source it at some point. But I'm sure similar parts exist.

http://www.ncepower.com/en/proMOSFETs.aspx?cateid=101

How about a part such as this

https://lcsc.com/product-detail/MOSFET_HL-1H05_C237256.html


At the price, you cna afford to buy a few, and check them out.      Who would hav ethought a microprocessor would cost you 0.03c


its specs for the price don't seem authentic.

[thm_w]

How about a part such as this

https://lcsc.com/product-detail/MOSFET_HL-1H05_C237256.html

its specs for the price don't seem authentic. Vacant also is a safe operating area - a part rated to the values which its rated to should have it specified.

That one is more suspicious.
If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

There are "fat" SOT23 packages which may be more suitable if you need higher currents as well.

[Richard Crowley]

Aren't they pretty new on the international market though? Never saw them before.

A few months ago LCSC were running banner ads right here on EEVblog Forum for several weeks.

[sokoloff]

If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

Power = I*I*R = 5 * 5 * 0.000234 = 0.00585 W, right?

[mikeselectricstuff]

If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

Power = I*I*R = 5 * 5 * 0.000234 = 0.00585 W, right?

234mR is 0.234R

[janekm]

How about a part such as this

https://lcsc.com/product-detail/MOSFET_HL-1H05_C237256.html

its specs for the price don't seem authentic. Vacant also is a safe operating area - a part rated to the values which its rated to should have it specified.

That one is more suspicious.
If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

There are "fat" SOT23 packages which may be more suitable if you need higher currents as well.

AO3400 would be a more suitable choice for anyone needing to switch that kind of current, as it has only about 0.35mOhm on-resistance (and it's from a fairly reputable brand). It does cost about 50% more of course! The horror! 

[sokoloff]

If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

Power = I*I*R = 5 * 5 * 0.000234 = 0.00585 W, right?

234mR is 0.234R

Ah, prior post above had the resistance listed as 0.234mOhm, not 234mOhm, a factor of 1000 error.

[janekm]

How about a part such as this

https://lcsc.com/product-detail/MOSFET_HL-1H05_C237256.html

its specs for the price don't seem authentic. Vacant also is a safe operating area - a part rated to the values which its rated to should have it specified.

That one is more suspicious.
If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

There are "fat" SOT23 packages which may be more suitable if you need higher currents as well.

AO3400 would be a more suitable choice for anyone needing to switch that kind of current, as it has only about 0.35mOhm on-resistance (and it's from a fairly reputable brand). It does cost about 50% more of course! The horror! 

Of course I meant 35mOhm... 

[LaserTazerPhaser]

How about a part such as this

https://lcsc.com/product-detail/MOSFET_HL-1H05_C237256.html

its specs for the price don't seem authentic. Vacant also is a safe operating area - a part rated to the values which its rated to should have it specified.

That one is more suspicious.
If you run it at 5A rds on is 0.234mohm. It would be dissipating 5.85W, and a temperature of 2,100C.
If you go based off of the rds spec and 350mW max dissipation, absolute max current is more like 1.2A. So saying 5A is BS.

There are "fat" SOT23 packages which may be more suitable if you need higher currents as well.

AO3400 would be a more suitable choice for anyone needing to switch that kind of current, as it has only about 0.35mOhm on-resistance (and it's from a fairly reputable brand). It does cost about 50% more of course! The horror! 

There is an enormous difference in price

https://lcsc.com/product-detail/MOSFET_AOS_AO3400A_AO3400A_C20917.html

https://www.digikey.com/products/en?keywords=AO3400A

[thm_w]

There is an enormous difference in price

https://lcsc.com/product-detail/MOSFET_AOS_AO3400A_AO3400A_C20917.html

https://www.digikey.com/products/en?keywords=AO3400A

The LCSC prices are 50% more is what they mean (ok its more like 60-90% more), but the actual cost of 6c is quite low..
1H05 3.3c for 5,000
AO3400A 6.3c for 5,000

Digikey price is inflated, due to tariffs and usual markup.

[rsjsouza]

At least here, a few parts I found more expensive than Mouser (ADS1240E, OPA2232AIDGKT, for example) and others were about 10~15% cheaper (ADS1232IPW).

For hobby I don't think it would make much difference, but perhaps their delivery and freight may make up for the difference.

[mrpackethead]

At least here, a few parts I found more expensive than Mouser (ADS1240E, OPA2232AIDGKT, for example) and others were about 10~15% cheaper (ADS1232IPW).

For hobby I don't think it would make much difference, but perhaps their delivery and freight may make up for the difference.

There are parts that are definately more expensive on LCSC than elsewhere.   You would probably not buy microprocessors from TI, or Microchip etc from them, becuase they are more expensive.   But they do have a lot of bargins elsewhere.

[Axk]

Trying to use Easy EDA and they have a handy feature where they have parts from LCSC in the component library.
I've just tried with a couple of parts, but looks very handy. At least for hobby use.
And there's apparently an option to ship parts and PCBs in one shipment.
So one can order parts while designing and have them shipped with the boards.
Haven't ordered yet, but at least in theory very convenient.

[bd139]

To note the parts and the boards are ordered at the same time but don't necessarily turn up at the same time... as I found out. 4 days between them.

[Axk]

To note the parts and the boards are ordered at the same time but don't necessarily turn up at the same time... as I found out. 4 days between them.

Even when you check the checkbox to combine the orders? https://support.lcsc.com/article/24-do-you-offer-combine-shipment-with-pcbs

[bd139]

Yep. Well once attempt from me failed miserably so far. I've heard other similar stories.

Still I have no complaints.

[HwAoRrDk]

I did an order recently with LCSC where I combined shipping with a PCB order from JLC. Not impressed either with the way they handled it.

While mine did at least turn up together in one package, it was the rest I had trouble with. Firstly, I got a "your order was shipped" e-mail from JLC when according to the order progress on LCSC that half wasn't even ready for despatch yet. Second, the tracking number in that e-mail, while it was for my package, was linked to the wrong site (17track), which had no record of it (should have been 4PX, which did). And third, even though I have since received everything, my LCSC order status still says "waiting for pickup".

So, the accuracy of communication is terrible. Will probably not bother doing it again, and just pay the extra few pounds for separate shipping.

[LaserTazerPhaser]

Its not authentic

https://pasteboard.co/HRv92kV.png

no were to be found also

https://www.infineon.com/cms/en/product/where-to-buy/

Same goes for TI

http://www.ti.com/info-store/distributors.html

parts on the site are likely similar to those found on ebay and aliexpress but with different performance.

[bd139]

That doesn’t mean it’s not authentic just that they aren’t the first hop in the supply chain.

About a decade ago someone at Crucial didn’t know that they were selling micron products 

[LaserTazerPhaser]

The several orders I placed including PCBs were very well packaged very much like if not precisely the same as digikey does.
But you get antistatic baggies and transistor tubes from aliexpress and ebay also.

But digikey way overdoes it on paper wrapping. Mcmaster is a bit more overboard than both of them, they just go very far to prevent product damage in transit.

The parts inscription appear to be identical however the small circle indent is not identical
https://lcsc.com/product-detail/MOSFET_Infineon-Technologies_IRF4905PBF_Infineon-Technologies-IRF4905PBF_C2564.html?manu_id=330

https://www.newark.com/infineon/irf4905pbf/p-channel-mosfet-55v-74a-to-220ab/dp/63J7300?st=IRF4905PBF

LCSC photographs most of the parts they have which makes them seem more legitamate.

[mrpackethead]

Its not authentic

https://pasteboard.co/HRv92kV.png

no were to be found also

https://www.infineon.com/cms/en/product/where-to-buy/

Same goes for TI

http://www.ti.com/info-store/distributors.html

parts on the site are likely similar to those found on ebay and aliexpress but with different performance.

LCSC is not the registered business name of the company either.   

I have found that TI parts are better priced from other distribution lines,  ( TI directly in fact is very good ).   I mostly buy passives from them, and have done a little bit of checking on them, and was able to verify that my electrolytic caps ( panasonic ) were in fact bonafide real parts.   My chinese manufacturing partners also use them a LOT and have had no problems, with fake parts, or re-reels.   If you look at prices at LCSC vs what is avaialbe out of the SEG for example, they are often 3x higher, as they just are not a grey-market reseller.

[ataradov]

Its not authentic

Not being an authorized distributor does not mean they are not selling authentic parts. There are many ways parts can get on the market.

[LaserTazerPhaser]

Its not authentic

https://pasteboard.co/HRv92kV.png

no were to be found also

https://www.infineon.com/cms/en/product/where-to-buy/

Same goes for TI

http://www.ti.com/info-store/distributors.html

parts on the site are likely similar to those found on ebay and aliexpress but with different performance.

LCSC is not the registered business name of the company either.   

I have found that TI parts are better priced from other distribution lines,  ( TI directly in fact is very good ).   I mostly buy passives from them, and have done a little bit of checking on them, and was able to verify that my electrolytic caps ( panasonic ) were in fact bonafide real parts.   My chinese manufacturing partners also use them a LOT and have had no problems, with fake parts, or re-reels.   If you look at prices at LCSC vs what is avaialbe out of the SEG for example, they are often 3x higher, as they just are not a grey-market reseller.

I recently placed orders with LCSC for passives along with a few other things well over 180 items and largely went with companies which I did not hear of - particularly Guangdong Fenghua Advanced Tech going off their website

http://www.fenghua-advanced.com

which is very decent and they have patents https://patents.google.com/?assignee=Guangdong+Fenghua+Advanced+Tech+Holding+Co+Ltd make them legitimate. Another company makes mosfets which is http://en.sinoictest.com.cn/newsinfor/p7_59.html?&pageid=7&_id=59 I noted another company Wuxi NCE Power Semiconductor participates in IEEE events https://ieeexplore.ieee.org/search/searchresult.jsp?newsearch=true&queryText=Wuxi%20NCE%20Power%20Semiconductor the important object about these companies is they stand by their products and provide datasheets for them right off their websites. This is a great indicator for authentic parts.

[mrpackethead]

I've been buying a lot of large inductors for Buck Regulators, and had great results from them. More than happy.  And saving 60% over a 'name' brand.  IN essense its a coil of wire on a ferrite former.  theres not that much that can go wrong with it.

Electrolytics are possibly my most likely to fail part, so I typically will run with more know brands there.   

[cdev]

I'm looking for small RF parts- saving a lot of money on parts would be very nice. If I just knew which parts were the ones I wanted.

I've been buying a lot of large inductors for Buck Regulators, and had great results from them. More than happy.  And saving 60% over a 'name' brand.  IN essense its a coil of wire on a ferrite former.  theres not that much that can go wrong with it.

Certain RF applications are technically challenging for manufacturers. For example, making an RF choke that has a low internal capacitance and high self-resonant frequency requires very thin wire and use of materials that don't degrade performance but offer adequate support to the coil at the same time.

[wraper]

The mosfets dont appear to be identical

Package itself looks exactly the same and marking does not look like Chinesium counterfeits have with low laser resolution. No signs of sanding surface with marking. I'm pretty sure it's genuine.

[LaserTazerPhaser]

The mosfets dont appear to be identical

Package itself looks exactly the same and marking does not look like Chinesium counterfeits have with low laser resolution. No signs of sanding surface with marking. I'm pretty sure it's genuine.

Is there a chemical free way to get to the die?

[wraper]

You can break plastic from the tab. Die will break but you still will be able to estimate it's area. IMHO just measuring RDS(on) is enough in this case.

[LaserTazerPhaser]

Opamps look identical

https://pasteboard.co/HSGgUNs.jpg

[LaserTazerPhaser]

You can break plastic from the tab. Die will break but you still will be able to estimate it's area. IMHO just measuring RDS(on) is enough in this case.

I did measurements varying Vgs putting 4amps thru drain to source and both parts were not close to be identical. The die packages do look identical.

https://pasteboard.co/HSGGk9m.jpg

[1276-2449-1-ND]

Trying to spot fakes by looks isn't going to work. ICs are made in batches, often years apart, sometimes by completely different fabs in different countries.

Most counterfeits (especially from Asia) are done by the same contract manufacturer that made the originals. Since they have all the machines and workers set up, they'll just run them a few days longer to make a batch for themselves.

In short, even if it looks and functions 100% identical it could still be counterfeit. Yet it could look different and the specs be a bit off and be completely authentic.

[wraper]

Most counterfeits (especially from Asia) are done by the same contract manufacturer that made the originals.

Bullshit. They are not made at the same factories. And please don't be another one among those who spread this stupid myth. Counterfeits often can be spotted by looks, like incorrect logo, weird font, sanded surface, blacktopping, differences in package, welding joint on leads (used parts with new terminals welded on). Of course there is no guarantee and genuine parts can be a bit different if made at different time or at different factory.

In short, even if it looks and functions 100% identical it could still be counterfeit.

Usually they don't. They appear to work fine on the first glance but there may be completely different die inside. Like weaker MOSFET or opamp with worse specs. Vreg which cannot supply rated current and so on. Often specialized ICs are specially made clones, but die is quite different, and often work unreliably or have some quirks. Also there are a lot of salvaged used parts made to look like brand new.
https://www.smta.org/chapters/files/SMTA_Great_Lakes_Chapter_Counterfeit_Components_-Integra_Mark_Marshall_(4-11_General)_handout_2.pdf
https://zeptobars.com/en/read/Ti-555-NE555-real-vs-face-china-chinese

[Mr. Scram]

Trying to spot fakes by looks isn't going to work. ICs are made in batches, often years apart, sometimes by completely different fabs in different countries.

Most counterfeits (especially from Asia) are done by the same contract manufacturer that made the originals. Since they have all the machines and workers set up, they'll just run them a few days longer to make a batch for themselves.

In short, even if it looks and functions 100% identical it could still be counterfeit. Yet it could look different and the specs be a bit off and be completely authentic.

If you look at counterfeit analysis you'll find that almost all counterfeits are significantly different chips under the hood. That doesn't coincide with the claim that counterfeits are ghost shift components.

[LaserTazerPhaser]

Here are the counterfeit objects.

https://pasteboard.co/HVIpXum.jpg

https://pasteboard.co/HVIs7K8.jpg

The issue with LCSC part is its Rdson is far below the Rdson specified in the datasheet in this case 5 amps was passed thru the drain - of the LCSC iteration and 32mVDS was obtained yeilding 6.4mR and remained cold while the mouser iteration got really hot really fast on 4 amps unlike the LCSC part which probably means its not using the same die as the authentic part. Since the thermal impedance is not identical to the specs. This likely means the LCSC part will not perform to most other specs listed in the datasheet also.

The assembly lot code of the LCSC part does not adhere to spec also.

https://nofile.io/f/ouvpOo6wFRQ/partmarking.pdf

This is probably why the laser markings are not identical to authentic parts. They do not appear to be authentic parts.

[thm_w]

Here are the counterfeit objects.

https://pasteboard.co/HVIpXum.jpg https://pasteboard.co/HVIs7K8.jpg

The issue with LCSC part is its Rdson is far below the Rdson specified in the datasheet in this case 5 amps was passed thru the drain - of the LCSC iteration and 32mVDS was obtained yeilding 6.4mR and remained cold while the mouser iteration got really hot really fast on 4 amps unlike the LCSC part which probably means its not using the same die as the authentic part. Since the thermal impedance is not identical to the specs. This likely means the LCSC part will not perform to most other specs listed in the datasheet also.

The assembly lot code of the LCSC part does not adhere to spec also. https://nofile.io/f/ouvpOo6wFRQ/partmarking.pdf

This is probably why the laser markings are not identical to authentic parts. They do not appear to be authentic parts.

Will you contact LCSC and let us know what they say?

Link: https://lcsc.com/product-detail/MOSFET_Infineon-Technologies_IRFZ34NPBF_Infineon-Technologies-IRFZ34NPBF_C21066.html

There is no minimum spec for Rds on, but you are right that it seems a bit low (spec is 40mOhm max)

[wraper]

The issue with LCSC part is its Rdson is far below the Rdson specified in the datasheet in this case 5 amps was passed thru the drain - of the LCSC iteration and 32mVDS was obtained yeilding 6.4mR and remained cold while the mouser iteration got really hot really fast on 4 amps unlike the LCSC part which probably means its not using the same die as the authentic part. Since the thermal impedance is not identical to the specs. This likely means the LCSC part will not perform to most other specs listed in the datasheet also.

For me rather sounds you screwed up measurement. Parts are too identical internally for me to believe this right away.

The assembly lot code of the LCSC part does not adhere to spec also.

Exactly like Mouser part, though. And it's not like there is wrong lot code, it's just written together instead of on opposite sides.

[LaserTazerPhaser]

The issue with LCSC part is its Rdson is far below the Rdson specified in the datasheet in this case 5 amps was passed thru the drain - of the LCSC iteration and 32mVDS was obtained yeilding 6.4mR and remained cold while the mouser iteration got really hot really fast on 4 amps unlike the LCSC part which probably means its not using the same die as the authentic part. Since the thermal impedance is not identical to the specs. This likely means the LCSC part will not perform to most other specs listed in the datasheet also.

For me rather sounds you screwed up measurement. Parts are too identical internally for me to believe this right away.

The assembly lot code of the LCSC part does not adhere to spec also.

Exactly like Mouser part, though. And it's not like there is wrong lot code, it's just written together instead of on opposite sides.

Not sure how the measurements were improper. It was 10vGS & the DMM measured ~32mVDS

The lot codes dont appear to begin with letters according to the spec sheet.

[wraper]

The issue with LCSC part is its Rdson is far below the Rdson specified in the datasheet in this case 5 amps was passed thru the drain - of the LCSC iteration and 32mVDS was obtained yeilding 6.4mR and remained cold while the mouser iteration got really hot really fast on 4 amps unlike the LCSC part which probably means its not using the same die as the authentic part. Since the thermal impedance is not identical to the specs. This likely means the LCSC part will not perform to most other specs listed in the datasheet also.

For me rather sounds you screwed up measurement. Parts are too identical internally for me to believe this right away.

The assembly lot code of the LCSC part does not adhere to spec also.

Exactly like Mouser part, though. And it's not like there is wrong lot code, it's just written together instead of on opposite sides.

Not sure how the measurements were improper. It was 10vGS & the DMM measured ~32mVDS

The lot codes dont appear to begin with letters according to the spec sheet.

I guess that current was incorrect or you made short between the terminals. In any case I suggest repeating the measurement. Also you could measure gate capacitance.  There is nothing written about lot code starting from digit. Scroll down to page 7 and look on the lot code starting with letter.

[LaserTazerPhaser]

The issue with LCSC part is its Rdson is far below the Rdson specified in the datasheet in this case 5 amps was passed thru the drain - of the LCSC iteration and 32mVDS was obtained yeilding 6.4mR and remained cold while the mouser iteration got really hot really fast on 4 amps unlike the LCSC part which probably means its not using the same die as the authentic part. Since the thermal impedance is not identical to the specs. This likely means the LCSC part will not perform to most other specs listed in the datasheet also.

For me rather sounds you screwed up measurement. Parts are too identical internally for me to believe this right away.

The assembly lot code of the LCSC part does not adhere to spec also.

Exactly like Mouser part, though. And it's not like there is wrong lot code, it's just written together instead of on opposite sides.

Not sure how the measurements were improper. It was 10vGS & the DMM measured ~32mVDS

The lot codes dont appear to begin with letters according to the spec sheet.

I guess that current was incorrect or you made short between the terminals. In any case I suggest repeating the measurement. Also you could measure gate capacitance.  There is nothing written about lot code starting from digit. Scroll down to page 7 and look on the lot code starting with letter.

Did you note the clean rectangular die bonding of the mouser iteration as opposed to the sloppy LCSC die bonding?

Seems you were correct the measurements were off proably what I originally measured was more.

I obtained 0.151vDS with the DMM and the power supply says 0.22v

power supply voltage = 0.044R
DMM voltage = 0.0302R

The DMM is more reliable in this case. The parts are legitimate.

https://pasteboard.co/HVUNdfZ.jpg

https://pasteboard.co/HVULbrW.jpg

I could have shorted something with the alligators in the other readings.

[wraper]

Did you note the clean rectangular die bonding of the mouser iteration as opposed to the sloppy LCSC die bonding?

It's just a piece of solder or solder paste applied in rectangular shape on the tab and then reflowed. In mouser part solder did not flow beyond it's original shape, in LCSC part it flowed a little bit in the middle. There is nothing wrong about it and there was no solder mask to stop the flow. Not to say more often than not solder flows into irregular shape than stays as neat rectangular. I would guess that if you take apart some more of mouser and LCSC parts, you could find both types in both batches.

[LaserTazerPhaser]

It would be nice if the not well known semiconductor brands actually made spice models for their products.

Many of them are excellent products.

[Axk]

Ordered PCBS together with parts from LCSC came fine in one package, EMS, took about 2 weeks.
The LCSC order changed to Shipped one day after the PCB order.

[cdev]

With reclaimed genuine parts, if they were tested adequately (might be very very difficult, though to do that) and clearly sold as reclaimed, and marked some way, I wouldn't have any problem with it.

If they made it possible for value-conscious people to use something again that otherwise would go into a landfill-good.

How to prevent them being sold as new? Only deal with manufacturers designated authorized vendors.

Like on ebay, lots of parts are sold as used. They usually work fine, and are very useful for people like me.

[LaserTazerPhaser]

does doesn't look authentic https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html MXG series doesn't have wide mounts

compare datasheets

LCSC: https://datasheet.lcsc.com/szlcsc/1901241640_Rubycon-450MXG820MLCALN35X60_C365690.pdf
https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html

Rubycon: http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_MXG.pdf
https://www.digikey.com/products/en?keywords=450MXG820

[wraper]

does doesn't look authentic https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html MXG series doesn't have wide mounts

compare datasheets

LCSC: https://datasheet.lcsc.com/szlcsc/1901241640_Rubycon-450MXG820MLCALN35X60_C365690.pdf
https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html

Rubycon: http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_MXG.pdf
https://www.digikey.com/products/en?keywords=450MXG820

Are you suggesting fake datasheet? Not to say it is for particular part number, not whole series.

[LaserTazerPhaser]

does doesn't look authentic https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html MXG series doesn't have wide mounts

compare datasheets

LCSC: https://datasheet.lcsc.com/szlcsc/1901241640_Rubycon-450MXG820MLCALN35X60_C365690.pdf
https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html

Rubycon: http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_MXG.pdf
https://www.digikey.com/products/en?keywords=450MXG820

Are you suggesting fake datasheet? Not to say it is for particular part number, not whole series.

Have a look at any reputable retailer and you wont find that particular part# listed on lcsc also the lcsc datasheet is very clumsy just look at its dimensioning and compare it to any other rubycon dimensioning very dissimilar the parts from that series do not have the same lead types found on lcsc listing.

Everything received from LCSC seems to be absolutely authentic but that particular capacitor seems non authentic.

[wraper]

does doesn't look authentic https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html MXG series doesn't have wide mounts

compare datasheets

LCSC: https://datasheet.lcsc.com/szlcsc/1901241640_Rubycon-450MXG820MLCALN35X60_C365690.pdf
https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html

Rubycon: http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_MXG.pdf
https://www.digikey.com/products/en?keywords=450MXG820

Are you suggesting fake datasheet? Not to say it is for particular part number, not whole series.

Have a look at any reputable retailer and you wont find that particular part# listed on lcsc also the lcsc datasheet is very clumsy just look at its dimensioning and compare it to any other rubycon dimensioning very dissimilar the parts from that series do not have the same lead types found on lcsc listing.

Everything received from LCSC seems to be absolutely authentic but that particular capacitor seems non authentic.

It's exactly the same part with different terminals riveted on, no difference internally. At least it's not rare to find genuine capacitors with dimensions not listed in datasheets. Also you can order customized capacitors if your order is big enough. I don't see anything wrong with specification sheet, it's not a full datasheet for series.

[LaserTazerPhaser]

does doesn't look authentic https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html MXG series doesn't have wide mounts

compare datasheets

LCSC: https://datasheet.lcsc.com/szlcsc/1901241640_Rubycon-450MXG820MLCALN35X60_C365690.pdf
https://lcsc.com/product-detail/Others_Rubycon-450MXG820MLCALN35X60_C365690.html

Rubycon: http://www.rubycon.co.jp/en/catalog/e_pdfs/aluminum/e_MXG.pdf
https://www.digikey.com/products/en?keywords=450MXG820

Are you suggesting fake datasheet? Not to say it is for particular part number, not whole series.

Have a look at any reputable retailer and you wont find that particular part# listed on lcsc also the lcsc datasheet is very clumsy just look at its dimensioning and compare it to any other rubycon dimensioning very dissimilar the parts from that series do not have the same lead types found on lcsc listing.

Everything received from LCSC seems to be absolutely authentic but that particular capacitor seems non authentic.

It's exactly the same part with different terminals riveted on, no difference internally. At least it's not rare to find genuine capacitors with dimensions not listed in datasheets. Also you can order customized capacitors if your order is big enough. I don't see anything wrong with specification sheet, it's not a full datasheet for series.

This capacitor was likely custom made for a specific order by rubycon or its a counterfeit, the dimensioning is very clumsy and its terminals dont fit the product series.

[wraper]

This capacitor was likely custom made for a specific order by rubycon or its a counterfeit, the dimensioning is very clumsy and its terminals dont fit the product series.

Sorry, but you claim some nonsense here. It's not any bit more clumsy than in datasheets you linked. And who in sane mind would make fake datasheets to begin with?

[LaserTazerPhaser]

Obtained these diodes and noticed their Forward Current Derating Curve is not legitimate. https://lcsc.com/product-detail/Diodes-General-Purpose_S10MC_C169472.html

Seems the manufacturer hasn't characterized this part.

[wraper]

Obtained these diodes and noticed their Forward Current Derating Curve is not legitimate. https://lcsc.com/product-detail/Diodes-General-Purpose_S10MC_C169472.html

Seems the manufacturer hasn't characterized this part.

What's not legitimate there? And it's not about characterization.

[LaserTazerPhaser]

Obtained these diodes and noticed their Forward Current Derating Curve is not legitimate. https://lcsc.com/product-detail/Diodes-General-Purpose_S10MC_C169472.html

Seems the manufacturer hasn't characterized this part.

What's not legitimate there? And it's not about characterization.

That SMT diode features a stud mounted diode property in which it works at high temperatures and needs little derating.

[wraper]

That SMT diode features a stud mounted diode property in which it works at high temperatures and needs little derating.

Excuse me, but do you imply that diode does not need derating when case temperature goes above 100^oC, and can work at full current even at 150^oC?
How about this one? Is it not legitimate too? https://eu.mouser.com/datasheet/2/115/SBRT10U60D1-756895.pdf
EDIT: I guess I understood it otherwise.

[LaserTazerPhaser]

That SMT diode features a stud mounted diode property in which it works at high temperatures and needs little derating.

Excuse me, but do you imply that diode does not need derating when case temperature goes above 100^oC, and can work at full current even at 150^oC?
How about this one? Is it not legitimate too? https://eu.mouser.com/datasheet/2/115/SBRT10U60D1-756895.pdf
EDIT: I guess I understood it otherwise.

Package is determinant of temperature also very disimilar properties in diode, the uncharacterized part isn't rated to same values as mentioned TO-252 diode.

[wraper]

Yeah, compared with this one https://eu.mouser.com/datasheet/2/395/S10GC%20SERIES_B1708-1224220.pdf it's too optimistic. Seems they screwed up with that chart.

[LaserTazerPhaser]

The proper object here for the uncharacterized part is fraudulent and very much hazardous to employ in any substantially important circuit node.

[wraper]

The proper object here for the uncharacterized part is fraudulent and very much hazardous to employ in any substantially important circuit node.

It's probably just copy paste error when making the datasheet. There is no much to characterize. Basically junction temp and junction to case thermal resistance.

[LaserTazerPhaser]

Manufacturers' site details their inadequate products. http://www.sdjingdao.com/en/about/index.php

[wraper]

Manufacturers' site details their inadequate products. http://www.sdjingdao.com/en/about/index.php

Actually this website is better than 95% of Chinese electronic component manufacturers have (if they have it at all). They even have a parametric component search which is something unheard of.

[bd139]

Yeah most of them are basically a large flash animation done about 10 years ago.

I think "Focus on products perserve dripping stone" is the the best mission statement so far though 

[LaserTazerPhaser]

Their other diodes are also improperly characterized. Especially with thermal resistance which further depicts improper specifications.
https://www.diodes.com/assets/Datasheets/ds16003.pdf

https://datasheet.lcsc.com/szlcsc/Shandong-Jingdao-Microelectronics-1N4007W_C108803.pdf

https://datasheet.lcsc.com/szlcsc/Shandong-Jingdao-Microelectronics-S2MB_C169470.pdf